Comet Hartley2 was discovered in March 1986 at
Siding Spring Observatory, Australia. In 2010 during its journey into the inner
solar system, the comet was the subject of the EPOXI mission to photograph the
comet up close. The mission was highly successful and results were
spectacular.
Here's some more
background about Comet Hartley2 and the mission.

Here's a view taken against the stars of
Monoceros.

9th November 2010; a15 minute
total exposure (15x1min subs) aligned on the comet's
nucleus. Note the short tail and comet's motion over the interval by
trailing of stars. Taken with a Canon450DH camera and 300mm
lens at f2.8, ISO1600; camera tracking the sky on an NEQ-6 Pro mount. FOV
approx 260x170 arcmin, N is to left.